Determination of a center feeling for eps sterring systems

a center feeling and eps sterring technology, applied in the direction of steering components, power driven steering, position/direction control, etc., can solve the problems of disturbing other parts of information, difficult to provide a behavior of target steering torque, and difficult to achieve the effect of improving the center point feeling, reliable and precis

Inactive Publication Date: 2012-10-11
ROBERT BOSCH AUTOMOTIVE STEERING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0005]It is the object of the present invention to generate an improved “center point feeling” for the driver for steering devices in vehicles comprising electrical power steering (EPS). This is intended to provide the driver with reliable and precise information, to as great an extent as possible, on current driving conditions and driving situations, while also achieving disturbance-free behavior in the center point range.

Problems solved by technology

Other parts of the information, in contrast, are considered to be disturbing.
Moreover, it may be difficult to provide a behavior of the target steering torque which is desired by the driver in the center point range of the steering, while achieving a low-disturbance straight-ahead position of the vehicle.

Method used

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  • Determination of a center feeling for eps sterring systems
  • Determination of a center feeling for eps sterring systems
  • Determination of a center feeling for eps sterring systems

Examples

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Embodiment Construction

[0021]FIG. 1 shows a control unit which is referred to hereinafter as the controller 1 and is associated with a steering device 2. A microprocessor 3 is disposed in the controller 1 and is connected via a data line 4, such as a bus system, to a memory medium 5. The controller 1 is connected, via a signal line 6, to a motor 7, such as an electric motor, allowing for control of the power of the motor 7 by the controller 1. The motor 7 acts on a torsion bar 9 via a transmission 8. A steering means 10, which in the present example is designed as a steering wheel, is disposed on the torsion bar 9 and can be used to apply a torque to the torsion bar 9 as a result of a driver actuating the steering means 10.

[0022]The steering device 2 moreover comprises a steering gear 11, which is designed, for example, as a rack-and-pinion steering gear. The steering gear 11 can further be designed as a ball-and-nut gear or recirculating-ball gear. The description hereafter primarily assumes a rack-and-p...

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Abstract

In order to transmit reliable and precise information, to as great an extent as possible, on current driving conditions and driving situations, and also achieve disturbance-free behavior of the steering system in the center point range, in a steering device in a vehicle, a target steering torque (torSSW) is determined by determining an actual toothed rack force (forRT), determining at least one first component for the target steering torque (torSSW) as a function of the actual toothed rack force (forRT), and determining at least one additional component for the target steering torque (torSSW) from a calculated toothed rack force (forRS), wherein the calculated toothed rack force (forRS) is determined from a wheel steering angle and a vehicle speed (velV).

Description

BACKGROUND OF THE INVENTION[0001]The invention relates to a method for determining a target steering torque for a steering means of a steering device in a vehicle.[0002]The invention also relates to a steering device in a vehicle. The invention further relates to a computer program that can be executed on a control unit of a steering device in a vehicle, and to a memory medium on which the computer program is stored.[0003]In modern steering devices, for example in an electric power steering (EPS) system or in what is referred to as a Steer-by-Wire (SbW) steering system, a target steering torque is determined, which is applied to a steering means, for example a steering wheel, in order to counteract or support the force applied by the driver. The target steering torque is frequently generated based on an actual toothed rack force acting on the wheels of the vehicle so as to provide the driver with the appropriate steering assistance. Additionally, further functions may be involved in...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B62D6/00
CPCB62D6/008B62D5/0466
Inventor STRECKER, JOERGWERNER, THOMASHIEGLER, STEPHANRODRIGUEZ, MANUEL DIEZ
Owner ROBERT BOSCH AUTOMOTIVE STEERING
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